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United States Patent | 5,337,228 |
Yang | August 9, 1994 |
A differential charging circuit comprising an active switch device controlled by a differential trigger circuit and a current impedance device to charge a storage battery through an intermediate storage capacitor. A capacitor and commutating inductance are also connected in series with the output to reduce ripple. The differential active switch device is controlled based on a reference potential developed across the current impedance device, and this enables frequency-controlled charging of the storage battery through the commutating type inductance.
Inventors: | Yang; Tai-Her (5-1 Taipin St., Si-Hu Town, Dzan-Hwa, TW) |
Appl. No.: | 862715 |
Filed: | April 3, 1992 |
Current U.S. Class: | 363/86; 320/143; 363/46; 363/128 |
Intern'l Class: | H02M 007/155 |
Field of Search: | 320/51,57,59,DIG. 2 363/45,46,84,85,86,89,125,127,128 323/265,282,284,299 |
3241044 | Mar., 1966 | Mills | 363/85. |
3305755 | Feb., 1967 | Walsh | 320/59. |
3369167 | Feb., 1968 | Hanchett | 363/86. |
3376488 | Apr., 1968 | Walsh | 320/57. |
3412314 | Nov., 1968 | Crane | 363/86. |
3636434 | Jan., 1972 | Beuk et al. | 363/128. |
3733535 | May., 1973 | Ballman | 320/DIG. |
3736490 | May., 1973 | Fallon et al. | 320/59. |
3781632 | Dec., 1973 | Charboneau | 320/51. |
3970913 | Jul., 1976 | Heindl | 320/DIG. |
4118768 | Oct., 1978 | Wilson | 363/85. |
4607324 | Aug., 1986 | Gibbons | 363/128. |
4698580 | Oct., 1987 | Yang | 320/59. |
4774449 | Sep., 1988 | Elkins | 320/59. |
5111379 | May., 1992 | Sharber et al. | 363/128. |
5214369 | May., 1993 | McCrea | 320/59. |